Peter,
My TB is running continuously during months.
It draws about 7 W using the black PWR-supply proposed by Tom (TvB).
In the room at about 22 °C it does show 32.43 °C, I never passed 37 °C.
So I would propose to net go beyond the 40 °C internal temp. reading. I
will manufacture a wooden box
Mark
You've come to the right place - well, that is if you want to devote a
significant amount of your life in the pursuit of ever-more accurate
time and frequency measurements
If you've only got one source then you need to use the frequency
discriminator method (aka delay line method)
Hi
The TBolt is rated to 70 C. You probably are ok running them at 50 C. The OCXO
does not mind the heat and there's nothing else in there that has any
noticeable heat rise.
If you text search for pool of mercury in the archives you will hit a thread
that goes into the details (and
Hi
The TBolt OCXO does have good noise characteristics. Unfortunately you have to
pull it out of the unit to figure that out.
Bob
On Aug 19, 2010, at 10:31 PM, Mark J. Blair n...@nf6x.net wrote:
On Aug 19, 2010, at 7:13 PM, Bob Camp wrote:
Hopefully they will keep GPS running long
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Alan Melia
Sent: Thursday, 19. August 2010 12:44
To: did...@cox.net; Discussion of precise time and frequency
measurement
Subject: Re: [time-nuts] GPS pcb IDs??
Hi Didier, the
Folks,
If any of you have a service manual for the Type 130 L-C meter do
contact me. I am trying to get one going for my collection.
Cheers
--
Raj, VU2ZAP
Bangalore, India.
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Thanks Christian, I have that doc but although I think it is probably
relevant the outline of the pcb is totally different to the pcb I have
though more like a number of M12 Oncores I have. Thank you for your
interest, and help.
Best Wishes
Alan G3NYK
- Original Message -
From: Christian
Mark,
you have the following options:
- HP (Agilent) E5052A/B or RS FSUP Signal Source Analyzer (works for a
single DUT, though limited to 1 Hz offset, normally useful for 10 Hz up
to 40 MHz).
- Compare two identical DUT's with a HP 3048A or similar PN test system
and subtract 3 dB, assuming
Hi
You can make a pretty good front end (mixer / amp / lock) for under $100.
That will let you measure phase noise with an audio spectrum analyzer.
Bob
On Aug 20, 2010, at 10:40 AM, Adrian rfn...@arcor.de wrote:
Mark,
you have the following options:
- HP (Agilent) E5052A/B or RS FSUP
Have you tried BAMA?
-John
===
Folks,
If any of you have a service manual for the Type 130 L-C meter do
contact me. I am trying to get one going for my collection.
Cheers
--
Raj, VU2ZAP
Bangalore, India.
___
time-nuts
On 08/20/2010 06:26 PM, J. Forster wrote:
Have you tried BAMA?
I have:
http://bama.edebris.com/manuals/tek/130/
Cheers,
Magnus
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Thanks Guys,
I Googled and nothing worthwhile turned up. BAMA.. I did not check. Now I've
got it.
Cheers
Raj
At 20-08-2010, you wrote:
Have you tried BAMA?
-John
===
Folks,
If any of you have a service manual for the Type 130 L-C meter do
contact me. I am trying to get
Hi Mike,
Do you still have any of these splitters available by any chance?
Thanks!
Henry
On Fri, Mar 26, 2010 at 4:29 PM, Mike Feher mfe...@eozinc.com wrote:
I have the same items available in original sealed bags, for $35 each for
one, $65 for two, and $120 for 4, plus actual priority
Hi...We purchased one of these from mike a year ago, and it really works
well.
Thanks
Thank You
Kiss-Electronics
Ms Ashley Hall
183 N 5th Avenue
Cornelius, Oregon
97113
W7DUZ
www.kiss-electronics.com
-Original Message-
From: Henry Hallam he...@pericynthion.org
On Aug 20, 2010, at 5:07 AM, Bob Camp wrote:
The TBolt OCXO does have good noise characteristics. Unfortunately you have
to pull it out of the unit to figure that out.
Is its phase noise substantially worse when it's in the unit? I.e., is the rest
of the TBolt adding a lot of phase noise to
On Aug 20, 2010, at 4:56 AM, Grant Hodgson wrote:
You've come to the right place - well, that is if you want to devote a
significant amount of your life in the pursuit of ever-more accurate time and
frequency measurements
:)
If you've only got one source then you need to use the
On Aug 20, 2010, at 7:40 AM, Adrian wrote:
- you may build your own HP 3048A alike system, but be prepared to invest
serious money and time, and much more time than you thought in the
beginning... (if that is what you're after, you'll have the most fun you can).
I did a quick survey of
On Aug 20, 2010, at 8:30 AM, Bob Camp wrote:
You can make a pretty good front end (mixer / amp / lock) for under $100.
That will let you measure phase noise with an audio spectrum analyzer.
I am intrigued by your ideas, and I would like to subscribe to your newsletter.
Oh, wait, I've already
Hi guys,
I want to find a frequency counter that will read to 1 hz precision up to a
minimum of 30 Mhz that I can clock using the output from my Efratom 101 Rb
frequency standard. I am quite happy to make one if there is a suitable
design out there. Any suggestions?
72/3 de Steve G0XAR
--
It
Virtually any HP counter made after 1975 will do that. You might also look
at a Tektronix TM-500 counter (DC503, ...) and mainframe.
-John
==
Hi guys,
I want to find a frequency counter that will read to 1 hz precision up to
a
minimum of 30 Mhz that I can clock using the
On Aug 20, 2010, at 10:35 AM, Stephen Farthing wrote:
I want to find a frequency counter that will read to 1 hz precision up to a
minimum of 30 Mhz that I can clock using the output from my Efratom 101 Rb
frequency standard. I am quite happy to make one if there is a suitable
design out
On 08/20/2010 07:39 PM, J. Forster wrote:
Virtually any HP counter made after 1975 will do that. You might also look
at a Tektronix TM-500 counter (DC503, ...) and mainframe.
A HP5335A or HP5334A should be good value for the money in that
category, just to get you started in finding
Mark J. Blair wrote:
oscillator inside a Tbolt then I don't think that a frequency
discriminator will be sensitive enough, although I might be wrong.
I got the impression that for good OCXOs like the HP 10811 or
(supposedly) the OCXO in my TBolt, the delay line method wouldn't provide
enough
Henry -
Yes I do. How many would you like. Thanks - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Henry Hallam
Sent: Friday, August 20, 2010 12:49 PM
To:
On Aug 20, 2010, at 11:17 AM, Rick Karlquist wrote:
On the 10811 production line, they would use Anzac AMC-123 amplifiers
to drive a +17 dBm mixer, and then amplify the IF output with a low noise
current amplifier like the Linear LT1028. You can easily homebrew
this setup. You will need to
Hi
Sounds like that's less than $100 on a home brew basis.
There are several variations you could try. None of them break the bank. All do
a quadrature test on a pair of OCXO's.
Bob
On Aug 20, 2010, at 2:17 PM, Rick Karlquist rich...@karlquist.com wrote:
Mark J. Blair wrote:
oscillator
I'm also beginning to look for a counter with very similar requirements.
Studying eBay the other day, I came to the conclusion that an HP 5384A would
be a good option, combining small size (compared to older rackmount
counters), adequate resolution, an external reference input, and
Hi
It's not that the TBolt is noisy, it's that good phase noise is a whole lot of
db down. If you look at the posted plots, there is a lot of digital crud in
them even with a good supply. The TBolt innards are the most likely source.
Bob
On Aug 20, 2010, at 1:00 PM, Mark J. Blair
Hi
I never liked the display on the 5384. The LED's on the 5335 or 5334 always
seemed easier to read.
Bob
On Aug 20, 2010, at 2:44 PM, Hal Murray hmur...@megapathdsl.net wrote:
I'm also beginning to look for a counter with very similar requirements.
Studying eBay the other day, I came
Almost any counter with a 10 sec (hz) resolution time is fine. Doesn't even
need to have provisions for an external clock , ( you can wire that in), as
long as it has a 10mhz time base. You're going to drive it with an external
10mhz disciplined anyhow.
Thank You
Kiss-Electronics
Ms
Hi guys,
A little research has revealed :-
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=150444654388_trksid=p2759.l1259#ht_1131wt_783
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=150444654388_trksid=p2759.l1259#ht_1131wt_783which
points to a guy selling a PIC based module which is
Hi Stephen,
I assume from the callsign that you are in the UK. You could do worse than to
buy a used HP 5316A for £75 from Stewart of Reading
http://www.stewart-of-reading.co.uk/Frequency%20Counters.htm A quality
compact universal counter with reciprical counting, external reference input
Gentlemen,
What you have is a Motorola SL Oncore navigation receiver, R6 series
model number, with timing firmware installed. These 8 channel receivers,
slightly smaller than the UT+ but larger than the M12x receivers, were
flashed with UT+ timing firmware and shipped to various telecom
I want to find a frequency counter that will read to 1 hz precision up to a
minimum of 30 Mhz that I can clock using the output from my Efratom 101 Rb
frequency standard. I am quite happy to make one if there is a suitable
design out there. Any suggestions?
Do you want to read the answer
Thanks Art that describes it faithfully and explains the differences. I am
sure one of the guys will offer to host the information for the group.
Thanks and Best Wishes
Alan G3NYK
- Original Message -
From: Art Sepin a...@synergy-gps.com
To: Discussion of precise time and frequency
On Aug 20, 2010, at 11:17 AM, Rick Karlquist wrote:
On the 10811 production line, they would use Anzac AMC-123 amplifiers
How does this amplifier look for this application?
http://minicircuits.com/pdfs/ZFL-500LN.pdf
If I understand the specifications properly, the noise figure is better and
It is good that you asked this FAQ. Basically, what is magic
about the AMC-123 is that it has certifiably low phase noise,
guaranteed by design and characterization, although not specified
by Anzac. The other 99.9% of amplifiers that seem plausible, like
this one, do not have the sophisticated
On Aug 20, 2010, at 2:19 PM, Rick Karlquist wrote:
It is good that you asked this FAQ. Basically, what is magic
about the AMC-123 is that it has certifiably low phase noise,
guaranteed by design and characterization, although not specified
by Anzac. [...] Having a low noise figure is
to drive a +17 dBm mixer, and then amplify the IF output with a low noise
current amplifier like the Linear LT1028. You can easily homebrew
low noise _voltage_ ?
73, Gerhard dk4xp
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Rick,
thank you again for having pointed me to the AMC123 that were just
available when you mentioned them.
Part of the magic is the 10 dB gain and typical +23 dBm output.
So, you don't saturate it with a 10811, which would be bad in terms of
phase noise, and, on the other hand, if you
+1 on the 5315 / 5316A/B.
5316's come with HPIB.
Both can be surprisingly cheap, and, they have no fan.
Adrian
Robert Atkinson schrieb:
Hi Stephen,
I assume from the callsign that you are in the UK. You could do worse than to buy a
used HP 5316A for £75 from Stewart of Reading
Guys,
My needs are pretty simple, i need to put the output frequency of my qrss
beacons into a 100 hz sub band within my chosen band of operation - mostly
30 meters. The beacon puts out a morse id in the form of a 4 Hz square wave
with a dot length of 3 secs or more. With a calibrated frequency
dk...@arcor.de wrote:
to drive a +17 dBm mixer, and then amplify the IF output with a low
noise
current amplifier like the Linear LT1028. You can easily homebrew
low noise _voltage_ ?
73, Gerhard dk4xp
Oh yes, low noise voltage. The noise current of the LT1028 is
actually quite high,
Mark J. Blair wrote:
On Aug 20, 2010, at 2:19 PM, Rick Karlquist wrote:
It is good that you asked this FAQ. Basically, what is magic
about the AMC-123 is that it has certifiably low phase noise,
guaranteed by design and characterization, although not specified
by Anzac. [...] Having a low
Would anyone else like to suggest a known good low phase noise
buffer amplifier? Maybe something from a Fred Walls paper?
You can always build HF isolation amps by rigging MMICs and attenuators
together, but this will not reliably get you below -160 dBc/Hz. Bruce G.
has given some good
you have the following options:
- HP (Agilent) E5052A/B or RS FSUP Signal Source Analyzer (works for a
single DUT, though limited to 1 Hz offset, normally useful for 10 Hz up
to 40 MHz).
- Compare two identical DUT's with a HP 3048A or similar PN test system
and subtract 3 dB, assuming
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